Iemstitching attachment for sewing-machines



(No Model.)

W. R. PARSONS.

HEMSTITGHING ATTACHMENT FOR SEWING MAGHINES.

No. 311,673. Patented Feb. 3, 1885;- F149]. Fj/y.

WITNESSES INVENTOR a A WinslowR.Parsong,

@Z, By his Attorney 1 N. PEJERSv Phawww nplwr. washin gion. DJ;

NlTFD @rarns arniv'r rrrent WVINSLOVV PARSONS, OF NATERLOO, IOW'A.

HENSTlTCt-HNG ATTACHMENT FOR SEVVlNC-MACHHNES.

SPECIFICATION forming part of Letters Patent No. 311,673, dated February 3,1885.

App'ir ation filed February 25, 1884. (X0 model.)

To aZZ whom it may concern.-

Be it known that LWIivsLoW R. PARSONS, a citizen of the United States, residing at Wat l-loo, in the State of Iowa, have invented a new and useful Improvement in Hemstitching Attachments for Sewing-Machines, of which the following is a specification.

This invention is additional to one having a like title described and claimed in my specifieation forming part of a previous application for patent filed July 14, 1888, Serial No. 100,840.

My present invention consists in certain novel combinations ofparts and features ofconstruction, hereinafter described and claimed, designed, primarily and as a whole, for use on under-feed sewing-machines, in combination with their ordinary or stitching presser-feet.

The special objects of this invention are, first, to form aseparating-bar with afree passage above and behind it for the upper piece of cloth, and a rear pressing-surface for, keeping both pieces of cloth in mesh with an un der-feed by a hemstitehing block wholly distinct from the presser-foot, so that the ordinary stitchingfoot may be used as aforcsaid; also, to provide for passing the loose stitches freely through the presser or presser-support of a hemstitching attachment or heinstitching attachments of any form; also, to provide, by improved nieansfor making the hemstitching more or less open or wide by varying the effective thickness of the separatingbar and correspondingly adjusting the presser ofsaid hemstitching-block to preserve said free passage above the separating-bar by like means; and, finally, to facilitate making said block by constructing it in two parts, as hereinafter specified.

A sheet of drawings accompanies thisspecifieation as part thereof.

Figure 1 of these drawings is a perspective view of a hemstitching attachment for under feed sewing-machines illustrating this invention. Fig. 2 is an elevation of the same in position on asewing machine. Fig.3 represents a sectional elevation of the same parts, illustrating the hemstitching operation. Fig. et-

represents back and edge views of the hemstitching-block shown in Figs. 1, 2, and 8. Figs. 4? and 4 represent end views of sets of interchangeable top pieces for separating-bar and presser, respectively. Fig. 5 represents back and end views of a one part block.

Like letters ofreferenceindicate corresponding parts and their nearest analogues in the several figures.

N represents the ordinary needle-bar and needle, P the ordinary presser bar and its stitching-foot, and F the feed-bar, of an ordidary sewing-machine.

C Orepresent. the level of the cloth-plate, and T, Fig. 3, represents an ordinary throatplate. These features may be those of any under-feed sewing-machine. I

To keep two pieces ofcloth, a b, apart during the stitch-forming period in the best Way known to me, so as to cause the sewing mechanism and its threads t t to produce the long stitches for heinstitching, a'sillustratedby Fig. '3, I support a separatingbar horizontally across the path of the needle by means of a spring-arm, A, for example, attached rigidly to and projecting from a substitute shuttleraee slide, 55, and in like manner connected with said separating-bar,so as to pre elude any turning or torsional displacement of the latter by the feed. Said separatingbar may be a distinct part, B5, of a two-part hem stitching-block, as illustrated by Figs. 1 to t, inclusive, or a portion, 5, of a one-part block, B, Fig. 5. In either case the main and peculiar functions of the separatingbar and its supports are precisely alike, and in each case it is constructed with a needle hole or slot, 00, extending through its rear edge from the path or foremost reach of the needle. By uniting with said separating-bar B8 or s a presser or presser-support, B1) or p, in rear thereof, parallel therewith, and of greater vertical depth or thickness so as to project above it, with a passageway, 20, between the two, and a passage-way, a, formed in part by the sole of the ordinary presscr-foot during the hemstit-ehing operation above said separatingbar, provision is made for the free passage of the upper cloth, a, to and beneath the 3ressing=surface, so that both pieces shall be fed together and uniformly without the aid of a special presser foot.

To provide for the free escape of the loose stitches beneath the presser or presser-support, however the latter may be formed, 1 have found that itis of great advantage to provide a groove, u, in the sole of the same, in line with the stitch-escape slotwof the separating-bar, 'as best shown in Figs. 4 and 5. With out this provision the stitches would sometimes catch at the front edge of the presser.

For rendering the hemstitching more or less open or wide, I provide the separating-bar, B8, for example, with interchangeable top pieces, is, of different thicknesses. Three are shown detached in Fig. 4 by way of illustration. More or less than three may be used. Each of these top pieces ts contains centrally a part of the stitch-escape slot 00, and the bar B8 is constructed with an undercut groove in its top, to which they are all fitted, and in which one ofasuitable thickness is held during the stitching operation, as shown in Figs. 1 and 3, its part of the slot 00 aligning perfectly with that in the bar proper. Interchangeable top pieces tp, Figs. 1, 2, 4 attached in like manner to the presser Bp, provide for adjusting its effective thickness to that of the separating-bar, as provided with its respective top pieces is. The presser top pieces tp obviously require no slotting. Inserted from the front in undercut stop-grooves in the line of feed, as shown, and arrested in proper position by a slight taper, as indicated, or by shoulders or offsets in customary manner, said interchangeable top pieces are readily inserted and with drawn by the right hand of the operator without removing the attachment from the machine, and their accidental displacement in use iseffectively prevented, the stop-grooves rendering them immovable save in a direction diametrically opposed to that of the feed.

The hemstitchingblocks. above described for use on under-feed machines, whether constructed in one or two parts and with or without said interchangeable top pieces, are adapted for support by one and the same springarm A, as above described, by making the support end 0" of the separating-bar B8 or s relatively thick, or of the same thickness as the presser or presser-support at the support end of the latter, forming a level surface, to which the spring-arm is suitably riveted, as shown. I

Manufacture is materially facilitated by making the separating-bar B8 and presser Bp as distinct parts, and uniting them to form a hemstitching-block by means of the springarm A, as illustrated by Figs. 1 to 4, inclusive. The passageway to between the separating-bar and the presser may be either iir clined in the direction of the feed, as shown in Figs. 1 to 4, inclusive, or have vertical walls, as represented in Fig. 5 or Walls of any other approved form.

I do not claim herein, broadly, the combination on an under-feed sewing-machine, substantially as hereinbefore specified, of a separating block or bar projecting in front of and a short distance hehind the path of the needle to keep two pieces of cloth apart during the stitch-forming period, an ordinary feed-dog, and a pressingsurface above said feed-dog behind said block or bar, with a clearspace immediately above said block or bar for the free passage of the upper piece of cloth over it, and a clear space I or passage immediately behind said block or bar for the descent of said upper piece of cloth to and beneath said pressing-surface, for the purposes set forth. This is claimed in my previous specification aforesaid, and is hereby disclaimed in favor of my said application for patent filed July 14, 1883.

2. In combination with the sewing mechanism and ordinary stitching presser-foot of an under-feed sewing-machine, a he'mstitching block supported beneath and separate from said presser-foot, and constructed with a separating-bar and a presser of great vertical depth behind and parallel with said bar. free passage-ways for the upper cloth being formed between said bar and the presser-foot and between said bar and said presser, substantially as herein specified, for the purposes set forth. V

3. In combination with the sewing mechanism of a sewing-machine, a hemstitrhing attachment or attachments comprising a separating-bar projecting in front of and a short distance behind the path of the needle, and provided with a rearwardly-opening stitch- .escape slot, and a presser or presser-support behind said separating-bar, with a stitch-es cape groove in its sole in line with said slot, substantially as herein specified, for the purposes set forth.

4. In combination with the sewing mechanism and ordinary presser-foot of an underfeed sewing-machine, a hen'istitchingattachment comprising a scparatingbar provided with interchangeable top pieces of different thicknesses held in 'undercut stop-grooves in the line of feed, and a'presser or presser-support provided correspondingly with interchangeable top pieces, as herein specified, for the purposes set forth.

5. The improved hemstitching attachment for under-feed sewing-machines, composed of a shuttle-race slide, S, a spring-arm, A, the separating-bar Bs, with its slot :0 and support end 7*, and the presser Bp as a distinct part, said bar and presser being separately attached to said Springarm, so as to be supported thereby in the manner set forth.

NV. R. PARSONS. Witnesses:

L. S. PARSONS, E. G. MOORE.

It is hereby certified that in Letters Patent N 0. 311,673, granted February 3, 1885, upon the application of Winslow B. Parsons, of Waterloo, Iowa, for an improvement in Hemstitching-Attachrnents for Sewing-lllaohines, an error appearsin the printed specification requiring the following correction, viz: In line 95, page 2,tl1e Word great should read greater; and that the Letters Patent should be read With this correction therein to make it conform to the record of the case in the Patent Office.

- Signed, countersigned, and sealed this 10th day of February, A. D. 1885.

[SEAL] M. L. J OSLYN,

Acting Secretary of the Interior. Oountersigned BENJ. BUTTERWQRTH,

Commissioner of Patents. 

